Study type:
Epidemiological study
(observational study)
Residential magnetic fields, medication use, and the risk of breast cancer
epidem.
By:
Davis S, Mirick DK
Published in: Epidemiology 2007; 18 (2): 266-269
Aim of study (acc. to author)
Further details
Participants of the study (publication 8545) were recontacted and interviewed regarding medication use during the 10 years before diagnosis. Regular use of medication was defined as use at least 4 days a week for 6 months or longer. The interview included following medication classes previously shown to be associated with reduced melatonin levels (publication 7471): calcium channel or beta blocker, psychotherapeutics, corticosteroids, and nonsteroidal anti-inflammatory drugs.
Endpoint/type of risk estimation
Type of risk estimation:
(odds ratio (OR))
Exposure
Assessment
Exposure groups
|
Group
|
Description
|
|
Group 1
|
mean nighttime bedroom magnetic field level (constructed variable)
|
Population
-
Group:
-
Age:
20–74 years
-
Observation period:
November 1992 - March 1995, March 2000 - December 2001
-
Study location:
USA (Seattle area, Washington)
Case group
-
Characteristics:
breast cancer
-
Data source:
Fred Hutchinson Cancer Research Centre, Seattle
-
Exclusion criteria:
not English-speaking, non-Caucasian
Control group
-
Selection:
-
Matching:
- sex
- area
- ethnicity
- 5-year age group
- case:control = 1:1
Study size
|
Cases |
Controls |
| Eligible |
813 |
793 |
| Participants |
558 |
588 |
Statistical analysis method:
- conditional logistic regression
(
adjustment:
)
Results (acc. to author)
Study funded by
-
National Cancer Institute (NCI; U.S. National Institutes of Health), Maryland, USA
Related articles
-
Kato I et al.
(2015):
Electric Blanket Use and Risk of Thyroid Cancer in the Women's Health Initiative Observational Cohort
-
Davis S et al.
(2006):
Effects of 60-Hz magnetic field exposure on nocturnal 6-sulfatoxymelatonin, estrogens, luteinizing hormone, and follicle-stimulating hormone in healthy reproductive-age women: results of a crossover trial
-
Schoenfeld ER et al.
(2003):
Electromagnetic fields and breast cancer on Long Island: a case-control study
-
London SJ et al.
(2003):
Residential magnetic field exposure and breast cancer risk: a nested case-control study from a multiethnic cohort in Los Angeles County, California
-
Davis S et al.
(2002):
Residential magnetic fields and the risk of breast cancer
-
Davis S et al.
(2001):
Residential magnetic fields, light-at-night, and nocturnal urinary 6-sulfatoxymelatonin concentration in women
